#include<iostream>
using namespace std;
#include<vector>
#include<algorithm>

void test01()
{
	vector<vector<int>> v;
	vector<int > v1;
	vector<int > v2;
	vector<int > v3;
	vector<int > v4;
	for (int i = 0; i < 4; i++)

	{
		v1.push_back(i + 1);
		v2.push_back(i + 2);
		v3.push_back(i + 3);
		v4.push_back(i + 4);
	} 
	v.push_back(v1);
	v.push_back(v2);
	v.push_back(v3);
	v.push_back(v4);

	for (vector<vector<int>>::iterator it = v.begin(); it != v.end(); it++)
	{
		for (vector<int>::iterator vit = (*it).begin();vit!=(*it).end(); vit++)
		{
			cout << *vit << " ";
		}
		cout << endl;
	}
}

int main()
{
	test01();
	return 0;
}